In Ref. [1]}, a quantum coherent state for the spherically symmetric
and electrically neutral Schwarzschild metric was introduced, following ideas from
Refs. [2]}, [3]}, [4]}, [5]}.
It was in particular shown that the conditions for the very existence of such a quantum state require
departures from the purely classical behaviour both in the infrared (IR) and,
more importantly, in the ultraviolet (UV).
The IR behaviour can be connected with the finite extent of our causally connected
Universe [6]}.
The UV deviation from the classical general relativistic vacuum can instead
be interpreted as the existence of a (quantum) extended matter core,
which sources the geometry [7]} and gives rise
to quantum hair [8]}, [9]}.
This quantum core indeed removes the central singularity and keeps tidal forces
everywhere finite.
Geometrical quantities like the Ricci curvature and the Kretschmann scalar
still diverge towards the origin, but their integrals remain finite, which corresponds
to having a so-called integrable singularity.
Furthermore, no inner horizon appears for any size of the matter core.
